Illuminated door-knob.



oo 0 9 1 4 1. Y L U J D E T N E T A B. P 0 K M D 5 W .A N I M U L L I l 8 3 9 8 n N APPLICATION FILED MAY 1,

............ Z2 kW// W/ 9N .IJQM d '15 required.

UNITED STATESIPATENT OFFICE.

JOHN W. LIND, OF BOSTON, MASSACHUSETTS, ASSIGNOR TO H. G. WILLIAMS AND J. A. SPIKER, OF SALT LAKE CITY, UTAH,

ILLUMINATED DOOR-KNOB.

No. 893,082. Specification of Letters Patent. Patented July 14? 1908.' Application filed May 1, 1907. Serial No. 371,272.

\ To all whom it may concern: i with metal contact plates 27, 28, and nor- Be it known that 1, JOHN W. Linn, a citimally held in positive engagement with the zen of the United States, residing at-Boston, studs 23, 24 by a coiled spring 29'secured to in the county of Sufiolk and State of Massathe disk 25 in position to be compressed bechusetts, have invented an Irn rovement in tween the latter and the door 30, to which 60 Illuminated Door-Knobs, of w ich the folthe escutcheon plate is secured. Preferably lowing description, in connection with the the arrangement of the contact studs 23, 24 accompanying drawings, is a specification, and the'contact plates 27, 28 is such that 1 like letters on the drawings representing like when the door knob is in normal position the P circuit will be open but when the door knob 65 My invention is intended to apply to all is turned therefrom the circuit'will be closed,

kinds of door knobs, particularly for outside the open position being indicated by the line doors, whereby the door knob is illuminated 31 in Fig. 2 and the closed osition 'by line and capableof throwing lightinthe directions 32. A switch 33 is preferab y interposed in the electric circuit 34 leading from any source 70 The constructional details of-my invention of energy, as battery 35, said switch being and the advantages thereof will be pointed .located, in ractice, inside the house conout more at length in the following descripvenient to the door so that the apparatus tion taken with reference to the accompanymay be rendered o erative or inoperative ing drawings, in which I have shown a prefor such periods of tl ie day as desired. One 7 ferred embodiment of the invention. urpose of providing the lens or large trans- In the drawings, Figure 1 is a central verucent window or means of externally transtical sectional view of the apparatus; and mitting the light is to provide means for Fig. 2 is a detail of one of the contact meina i d di l i t th observer the bers shown in front elevation", indicating also house mb hi h i i t d or th i 80 the electric Connectionsdis layed thereon as indicated at 36.

In carrying out my invention I provide an 11 use it will be understood that when the escutcheomplate 1 having a central bulge or circuit is closed the doorknob is brilliantly enlargement 2 provided on its backside with illuminated, a portion of the light being a recess 3 preferably shouldered at 4, and tran mitted ba kwardly through th appa- 85 i ai rec 1 mount 1 Pl t i k 5 f t ratus 12 to illumine the keyhole, doctors on a door knob s in'dle 6 carried by a usual sign, door plate, or other adjacent object destud or hub 7 at t e front of the escutcheon. sired, and the main ortion of the light being Th Outer en f i hu i threaded to r transmitted forwar through the lens or winceive the internally threaded neck 8 of the dew 14, thereby rendering clear and rom 90 knob 9 secured by'any suitable means as by nent th house number 36. It will e una screw 10. The knob is hollow, as indiderstqod that, in a small town where the Gated at and P f bly provided with houses are not numbered the window 14rmay laterally o ening perforations 12 for the pascontain the name instead of the number at sage of lig t rearwardly, and ha a front ap- 36. I preferably use alens as shown,1n order 95 erture threaded at 13 to receive a'lensor 'to make the number more conspicuous.' translucent portion 14, herein shown as held the lamp should get broken the knob port on in a holder 15 threaded to fit the aperture 13 9 is readily unscrewed, thereby permltt ng and clamped in osition by a ring 16. The free access to the lamp. My construction 4 outer end of the ub is provided with an in- .also permits the entire mechanism to be car- 1 sulating block 17 having a usual electric i ried by the escutcheon, thereby avoiding lamp socket 18 for recei ing the threaded cutting away the door in any special manner end 19 of an incandescent bulb 20 or other to receive anyof the parts and also making means of electric illumination. From the it practical to use my attachment in connecelectric lamp the usual circuit wires 21 22 tion with any usual look. In other words, 105 pass to contact studs 23, 24 on the disk 5 the attachment is practically self-contained, position to cooperate with a non-rotating not requiring any, special. construction of contact plate or disk 25, which-is shown best door lock or ad acent arts. It will be unin Fig. 2, said plate being preferably retained derstood that if desire the cooperating conby screws 26 andherein shown as provided taots may be so placed as to maintain c rcuit centrally lengthwise in said some purploses it is desirable that the hollow door ob shall be composed entirely of translu- 'cent material, this construction affording wide scope for display effects in color and 3. An ,designs.

I am aware that electricity has been aplied to the illumination of door knobs, push uttons and the like, and accordingly I do not claim the same broadly, but so far as I I am the first to b and to display the 4 loy a lens or window in the knob;

by th and circuit closing contacts mounted in said recess and operated by said door knob.

2. A door knob, comprising a supporting stud, a lamp support removably mounted stud and prosaid escutcheon and provided with electric clrcult connections, name to this the switch be- I vided with an lar shell of substantially uniform thickness terminating at its rear side in a cylindrical neck fitting externally said stud, said shell at its front side coaxially with the hollow of said neck having an aperture provided with a removable holder, a translucent )ortion fittin escutcheon plate, having a central enlargement rovided on its rear side with a recess; a oor knob centrally mounted electric lamp socket, a g1obuthereon, illuminating means carried by said door knob, a contact member movable with said door knob, a cooperating contact member non-rotatably carried by said escu tcheon two contacting members toward each other.

4. A door knob comprising a rotatable supporting stud havin a forward chainbered end, a hollow glo ular knob having a translucent portion and terminating at its rear side in a hollow neck rigidly secured to said stud, an insulating block removably seated in the chambered end of said stud within said hollow neck, and a lam detachably mounted upon said insulating lock and projecting into said knob.

In testimony whereof, I have signed my specification, in the presence of two subscribing witnesses.

JOHN W. LIND. Witnesses:

GEO. H. MAXWELL, Enwn. MAXWELL.

house number; plate, and means normally pressing said 

